31311001310131 has 4 divisors (see below), whose sum is σ = 31311018093672. Its totient is φ = 31310984526592.

The previous prime is 31311001310129. The next prime is 31311001310159. The reversal of 31311001310131 is 13101310011313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31311001310131 - 2¹ = 31311001310129 is a prime.

It is a super-2 number, since 2×31311001310131² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31311001310099 and 31311001310108.

It is not an unprimeable number, because it can be changed into a prime (31311001310101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5184910 + ... + 9460723.

It is an arithmetic number, because the mean of its divisors is an integer number (7827754523418).

Almost surely, 2^{31311001310131} is an apocalyptic number.

31311001310131 is a deficient number, since it is larger than the sum of its proper divisors (16783541).

31311001310131 is a wasteful number, since it uses less digits than its factorization.

31311001310131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16783540.

The product of its (nonzero) digits is 81, while the sum is 19.

Adding to 31311001310131 its reverse (13101310011313), we get a palindrome (44412311321444).

The spelling of 31311001310131 in words is "thirty-one trillion, three hundred eleven billion, one million, three hundred ten thousand, one hundred thirty-one".